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Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningSteering Angle Sensor Calibration Warning
Warning: For vehicles with electric power steering (EPS) and without
a vehicle stability enhancement program, the steering angle sensor
MUST always be calibrated after the battery has been disconnected. Failure to
calibrate the steering angle sensor could limit the operation
of the EPS system ...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Collision Sectioning Warning in the Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Dis ...
SIR System Description and Operation
SIR System Overview
The supplemental inflatable restraint (SIR) system supplements the protection
offered by the occupants Seat Belt System (2). The SIR
system may contain several inflator modules located throughout the vehicle, i.e.
steering wheel module (1), instrument panel module (1),
...